Process for producing ultrafine metal particles

Details Process for producing ultrafine metal particles Process for producing ultrafine metal particles

1989-11-09

1991-11-12

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75348, 75362, B22F 930

Patent

active

050644645

ABSTRACT:
The present invention provides a process for producing ultrafine metal particles by gas-phase pyrolysis of 0.1 to 30% by volume transition metal carbonyl compound diluted with a diluent gas to form a mixed gas, which comprises supplying 1 to 30% by volume of the mixed gas of up to 200.degree. C. and 99 to 70 % by volume of a second diluent gas. The second gas heated to at least 400.degree. C., serves as a heat feed source for gas-phase pyrolysis to a reaction zone. The gases are mixed together there to carry out gas-phase pyrolysis in the presence of a magnetic field of at least 100 gauss.

REFERENCES:
patent: 2776200 (1957-01-01), Wallis
patent: 2884319 (1959-04-01), Fabian et al.
patent: 2900245 (1959-08-01), Beller
patent: 3918955 (1975-11-01), Dewelyn
patent: 4629615 (1986-12-01), Cheng
patent: 4808216 (1989-02-01), Kageyama et al.

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